Artificial refrigerating apparatus



July 19, 1932. I c'Q M. HOLLEY ET AL 1,

ARTIFICIAL REFRIGERATING APPARATUS Filed Sept. 15. 1922 4 Sheets-Shet 1 y 1932-v c. M. HOLLEY ET AL 1,868,359

ARTIFICIAL REFRIGERATING APPARATUS Filed Sept. 15. 1922 4 Sheets-Sheet 2 O Q Q 0 0 0 O O Q Q nQenta Ls (/arer/ce MJ-falle flan am L Fwzer July 19, 1932.

' c. M. HOLLEY ET AL ARTIFICIAL REFRIGERATING APPARATUS Filed Sept. 15, 1922 4 Sheets-Sheet 4 zmdeniama eer Patented July 19, 1932 ,um1-m STATES CLARENCE M. HOLLEY, or HIGHLAND, PARK, ANnnowARD L, ros'rnnfor DETROIT,

momeau; sun HOLLEY AssIGNon 'ro SAID ros'rna- 'ARTIFICIAL nnrnIGEnATI-Ne Armlearnsv Application filed September 15,192. s iarnqQ58aaa This,,.invention relates .to'.' artificial re- .frigeratingapparatus,.and the object thereof is .to provide a simple and compactfrefrig'erating apparatus that is attachableas a complete unit to a refrigerating box or storage ,conipartn ent. A' further object is to providea compact structure that'may be attached to;- or removed from the refrigeratoigas a.ui1it,'wi'thout detaching any of the am component parts of the unit ordisconnedling" any of the, elements one froin the other.

-A,further object ofthe invention is to provide .a unit, of'the character'stated, carried in a casin that ma be attached to a re- ;15 frigerator box, projecting thereinto, with the cooling coils or element on the outside, ,of thecasing, and'the apparatus for producing the cold, Within the casing or comthe householder. Afithe present time-most households areprovided with a refrigerator j. utilizingnatural;ice'as the cooling medium 'jand many'types ofartificial cooling apparatus. at presentin use','ar'e' built: into a box especially d'esji'gnecllforthe apparatus requiri th it ei 4 trims ri e; to in',:order' a; 'hyail himself er discardfor idispo'se the usual type off artifioial refrigerating" apjpariatusl expensive; and 'we have so "therefore devised; artiiicial cooling apparatus 7? "f of such compact form. that it' may be m'tro- Hpartment, that is shielded from 'the storage;

coolin "of the com 'ression c oils'of' thes sjco npartment and into which atmospheric 1 w air may, be drawn and discharged for the duced into thejus'ualice compartmentof' the ordinary ice box I thus: niaking artificial 'refrigerating Y apparatus available for persons of moderate meansi' Another featureof the invention is insof constructing the unit that the door'of the icecompartment maybe removed andthis apparatusintroduced, the

apparatus being provided witha frame that '-ma'y]be cut at the periphery and shap'ed, to

. tem, as is hereinafter more fully described.

' As'is'well'known, there are two structures commonly in use in artificial refrigeration, in one of which the expansion coils are in direct-contact with the air to be cooled and in the other of which the expansion coils are immersed in a brine which provides the coolingcleuie'nt. It is not material to this invention which type of refrigerating apparatus be utilized, the invention in this instance residing in the unit adapted to be attached to the refrigerator box, comprising a compartment. for containing the oper. tive mechanism, exteriorly of which is provided the cooling element (either the brine type or direct type as mentioned), the compart' nient containing the apparatus being heat nsulated from the refrigerator compartment and being open to atmosphere.

other feature of the invention resides in the arrangement of the operative parts whereby compactness 1s secured and the said parts its being subjected to a flow of air thereby place.

chamber with onetype of frame utilized with f fit the door opening andmay'bepe'rmanently attached thereto desired but preferably jr emovable' to permit a than-geunits when repair is required. By this arrangement the cost of the refrigerator box is avoided, the householder being enabled to"utilizethe structurethat is already installed. These and other objects and novel features of the invention are hereinafter more fully deso scribed and claimed, and the preferred form of construction or refrigerating apparatus embodying our invention is shown in the accompanying drawings in which Fig. 1 is a vertical section showing our improved unit as applied to an ordinary re frigerator box and indicating one type of artificial refrigerating apparatus.

Fig. 2 is'a similar view showing theunit of the brine tank type in the same general relationship as with the apparatus showri inFig.1.

'Fig. 3 is a front elevation showing the 5 ice our improved unit. I Fig. 4 is a cross section thereof taken on"- lines 44 of Fig. 3. v I

Fig. 5 is a front elevation of part of a refrigerator box showing our improved unit In the usual type of artificial refrigerating apparatus utilizing sulphur dioxide or similar refrigerant, there is employed a pump or compressor indicated at 1 in Fig. 1 which compresses the refrigerant transferring the same to the high pressure coils 2 from which it passes by means of line 24 to an expansion valve 3 and thence to the expansion or low pressure coils. 4 returning to thepump by means of the line 5. To secure compactness we have arranged an electric motor 6 having a shaft 7 extending forwardly of the motor to the fan 8 and rearwardly thereof into the pump case and, as will be understood, operatively connected with the crank shaft or other means utilized to operate the compressor, the compressor preferably being of the air cooled type for which reason fins 9 are provided on the compression end of the pump cylinder.v This mechanism is housed within the chamber indicated generally at 10, this chamber being formed by the heat insulated wallsll extending entirely thereabout on five sides, the sixth or front side being open to the front of the refrigerator and occupied by th e hig'h pressurecoils 2 through which the fan 8 draws air into the compartment to cool and condense the fluid in the high pressure lines 2. Vi e also provide a deflector plate 12, one end of which is secured to the top of the motor and the other end of which extends upwardly therefrom to the coils 2 near the top. This plate extends entirely across the chamber '10 from side to side and air drawn through the coils 2'by the fan is blown backward into the chamber 10 about the compressor, and motor and thence outward above the deflectorto atmosphere through the channel 13. Preferably a frame indicated at 14, is placed over the'coils 2 having a central opening 15 as shown clearly in Fig. 5 through which. air may pass through the coils. A small cross member 16 is provided having an inwardly bent lower edge as shown in Fig. 1 extending nearly to the outer end of the deflector 12 forming a completion of the said deflector carrying the air upward through the channel 13 and outward through the aperture 17 in the upper part of the frame 14.

A thermostat is also employed indicated at 18 in Fig. 1 which may be of any approved type here shown as being provided with a coiled bimetallic element 19 which, through influence of change of temperature in the refrigerator, makes or breaks the circuit to themotor. This circuit is not here shown but the operation of a thermostat is so well known by those skilled in the art that further description or illustration of its conneotion with the circuit is deemed unnecessary. In the type of apparatus shown in Fig.

1 the thermostat 18 is preferably located inthe upper end of the chamber in which the unit is introduced thus being subject to the openings therefor differing in size it is necessary'to provide a unit that'is very compact "as'is above described and further to provide an element in conjunction with-the unit-to take the place of the door of the ice compartment which must be removed to permit introduction of our improved apparatus. This problem has been solved by providing a frame 20 extending-about the casing 11 of the unit near the forward open end. This frame may be permanently attached 'to the casing. by means of lag screws 91 or other means. The peripheral edge of this frame 20 is shown in Fig; 1 as being beveled which is the usual form of peripheral edge of the door which- 1' is replaced by thisframe'; In manufacture, this frame is'le'ft-rough" at the periphery and is cut to fit the door opening. Thus, all that is necessary to install this'apparatus in any ordinary box is to remove the ice compartment door, face off the frame 20 to correspond to the sides and shapeof the door opening and insert the unit into the ice compartment. To secure the'same in place, we provide plates 21 at several oints above the periphery, and fastened to tie frame 20 and the contiguous part of the refrigerator box. By this arrangement the unit is readily removable,

permittinginterchange of units when any particular unit becomes inoperative for any cause, enablingit to be taken out and repaired or, if the repair is one requiring considerable time, the corresponding unit may be substituted. l/Ve have shown the coils 2 and 4 in cross section. It is to be understood that these coils are continuous in form, the coils 2 being connected with the compressor by the line 23 and with the expansion valve by the line24, the coils 2, and .4 being provided with fins to increase the surface in contact with the atmosphere as is usual withthis type of coil.

In the structure shown in Fig. 1, the entire unit is supported by the frame 20 but brackets could be additionally provided, if desired, particularly at the inner end of the unit, to sustain the weight thereof. It is also to be observed that this frame, shown at 20 in Fig. 1, is indicated at 30 in Figs. 2, 3 and 4 and may have a metal frame attached thereto indicated at 31 in the said figures. This frame 81 is preferably formed of angle iron attached to the member 30 and the unit may be simply inserted into this frame member 31 or removed therefrom without removal of the frame. member 30 .which fits the; door opening. In the case of the apparatus shown in Fig. 1, coils 4. at the ends would rest in the frame member. The-apparatus shown in Fig. 2 is essentially the same in general char ISO acter, hayin' the same type of compressor,

at 44 being of a type haying a' tube .45 extendling into the brine andcontainingan expansi- -b le fluid, as sulphur dioi zide which, upon the expansion due to increased "temperature et; the brine, closes the circuitto the motor 46 and on contraction, due to decrease in temperature,'breaksthe circuit (which cir'cuit'is nothere shown). As will be understood from Figs. land 2, either type ofartificial'refrigerating apparatus maybe utilized, our

invention being confined 'mo'r'eparticularly to theun it as a whole, and its adaptability for replacement of theice chamber door of "anordinary refrigerator, and extending into the'stor'age compartment, and open to atmosphere, and insulated from the storage' com partment of the refrigerator to' prevent the temperature thereof being eifectedby' the x temperature of the atmosphere in the compartment 10 01 41 occupied by the apparatus.

In Fig. 2 the expansion valve between the highand low pressure lines 47 and 43 is indicated atfiS within the apparatus chamber 41. I

I AS, heretofore stated, an object oft he invention is to secure a compact arrangement of parts in the form of a unit that is attach- .ableldirect-ly to the front walls of the refrigerator, replacing the door of theice compartment, and these doors are usually about twenty inches high and fifteen inches wide and, by arranging this frame 20 or 30 intermediate the ends of the casing, housing the unit, wesecure sufiicient depth to accommodate the necessary apparatus. Thus, the high pressure coils extend outwardly from the face of'the refrigerator to a greater or less extent, depending somewhat upon the character of the apparatus utilized and, if the brine tank is utilized as shown in Fig. 2, the forward end of the unit projects to a greater extent beyond the face of the refrigerator box, as a greater length over all of the unit is required to accommodate the brine tank. However, as heretofore stated, the character of refrigerating apparatus is not material to the invention as any well known character of apparatus adapted for the purpose may be utilized.

Our arran ement rovides a lar e area of high pressure coils subject to the temperature of atmosphere and to a flow of air therethrough by the means described, while the atmosphere of the refrigerator compartment is controlled by the temperature ofthe low pressure or expansion coils 4- or the brine in the tank 42. While the air'drawn into the chamber 10 or 41 is heated somewhat'above atmospheric temperature, due' to' its passing through *thehi'gh pressure coils, yetthe constant flow'ofair'tends'to prevent overheating of th motor or compressor and the preferable compressor structure is of that type in:

"which oil is carried in an enclosed casing to insure luhricationof the various parts.

7 From thefiforegoing description it is evident that an essential characteristic of our invention 'isrin the provision ofa casing-.-

carrying the" refrigerating apparatus, arid 1n.o

'shown; This drippan is a permanent structuresupported'by brackets in the interior of: the refrigerator and the purpose is to catch the moisture condensed on the cooling'coil's'4 "or brine tank-42 in'the two types of artificial refrigerating devices here shown. "This'drip pan does-not interfere with circulationof. 'air to 'an'dfrom the cooling element'of the device,'"the'- air flowing to and from the cooling element in the same manner 'as 'to' and from'the ice. Our improved structure therefore simply is of such com--" pactv form and arrangement "as to be in troduced in the icecompartment as a unit occupying the space heretofore provided for the ice/and one principal feature of the-invention is' in; the provision of the frame membe'r'and the casing' withithe heat insulated walls adapting the device to be introduced into the door opening of the ice 'comparb ment replacing the door and sealing the refrigerator compartment to atmosphere in equally as efficient manner as the door and in this respect it is to be noted that it is-not material whether the casing housing the re frigerator parts has the member 20 fixedly secured thereto or whether the casing is moved into the frame member as indicated in 2. In the said last named figure the casing may be withdrawn leaving the frame 30 and 31 in .place, the casing being a sliding fit in the frame member 30 andpreventing a leakage of air between the frame 30 and casing 40 at the forward end. Either of the structures permit'readyremoval or introduction of the unit as a whole and the refrigerator box need not be reconstructed in any particular way to accommodate the unit.

Having thus fully described our invention, what we claim and desire to secure by Letters Patent of the United States is- 1. Thecombination with a refrigerator having an opening, of an artificial refrigerating unit includingiexpansion and compression coils and apparatus for causing circulation of a refrigerant in the coils, and

a heat insulating casing carrying the unit 3 insertible through the opening and closing the opening when positioned therein, the said casing having an open end permitting circulation of air therein when the unit-is in 5 operation. A I

2. The combination with a refrigerator having an opening, of an artificial refrigerating apparatus including aheat insulating casing housing and carrying the said apparatus, thesaid casing and apparatus being insertible as a unit into the opening of the refrigerator and closing saidopeningto atmosphere,-and means for causing acirculation of air in the'casing, the casing being sealed to the refrigerator compartment.

3. The combination with .a refrigerator having'an opening leading to a compartment therein, of an artificial refrigerating unit insertible through the-opening, said unit including a heat insulating casing open to atmosphere and housing ;a portion-,ofthe refrigerating --apparatus and supporting -.,t he expansion coils of the system 'on' the exterior, said apparatus including means-for circulat- 25 mg air within the casing and the casing closing the opening and sealing the refrigerator compartment to atmospherewhen introduced ,thereiuto. v

4. vThe combination with a refrigerator having-an openingleading to a compartment therein,- of an artificial refrigeratingunitin sertible through the opening, said unit including a heat insulating casing open toatmosphere and housing-the heat productive portion of the refrigerating apparatus and supporting the expansion coils of the system won the exterior, said apparatusincluding means for circulating ainwithin the .casing and the casing closing'the opening-and sealing the refrigerator compartment to atmosphere when introduced thereinto.

5. The combination with a refrigerator having an opening leading to a compartment therein, of anartificial refrigerating unit comprising a heat insulating casing having an opening to 'atmospherevand:being insertible into the compartment through the refrigerator opening, means in conjunction. wlththe unit for sealing the said openlng,

and artificial refrigerating apparatus,,the heat productive portion of which is housed within the casing and including means for circulating air therethrough, and the expansion coils of which are located on the exterior of the casing within the compartment.

6. The combination with a refrigerator having a compartment and an' opening on opening and sealingthe compartment thereof to atmosphere, the said casing within the aring: p g edias; dfiIq which air Li T .m ytfiew'no ra i artificialr p t .,arpa at lt my frig'erantthere' j H lated casingho K with the uni f air in the casing to discharge the heat units heat insulated, casing provided with ;a frame nearthefopen end 'fittingthe refrigerator therein, of an artificial re rigerating unit ineluding expansion and compression coils and power apparatuszfor' cir'cu atingthe refrigerant in; the: coils, arid :a, heat insulated (jasing carrying ari d'fhousing. thenmr, said cas ing being-.insertible into.,the refrigerating of the refrigerator compartmentandthe cool-.

. lsfpfithe uni be m l lifi il l ihi exterior of thle 'tl'e c'o'm artinent. 1,1;

- .11 9 tame-m T frgi a ti jtng eii mitt:

' 'rat i w e reera e n i ein o fil -Pn fngfQfi ,t th tra ing of, th ea in e i rin practically with the ,e e' the/rtfrigerator compartinent rn ns p I ciosingf tn com artinent to atmosphere ri en introduction 0 the casing thereint o, the said casing being niouiit'ed in the compartmentin spaced"rel atioril with the walls thereof and the cooling coil of the refrigerating apparatus; being supported v within the compartment or; the e tterior of the said'casing. j: i}

I 9. The combination witharefrigeratorhaving an opening leading to-a compartment therein, ofan artificial refrigerating unit in-, cluding a casinghavingheat-ins'ulated walls housing the apparatus and insertible into the compartment througli' the opening and closing the compartment to. .i ternal atmosphere, the casing having an opening. to atmosphere for discharge of heatfrom the interior thereof and the cooling element of the unit being exposed to the atmosphere of the refrigerator compartment. 3 v I 10. The combination with a refrigerator having an opening, of an artificialjrefrigerating unit insertible through the opening, the said unit including a heat insulated casing for the operating parts, means for circulating developed by the apparatus, a cooling-elementexteriorly of the casing on the end projectinginto the refri er'ator, and a frame about the forwarden of the casing fitting the opening and detachably secured therein.-

11. The combination with a refrigerator having an opening,lof anartificial refrigerat- Uing unit including a casingfor the operating compartment being spacedfrom the walls: 65 thereof andthe cooling coils ofthe unit be-.

parts, means for circulating airin the casing to discharge the heat units developed by ,ther aso apparatus; said casing'bei'n 'insertible into the r'efrigerato'rthrough he opening, the walls of the casing projecting into the refrigerator being heat insulated, 'a' frame about the forwardend of the casing fitting the 'refri, 3; :rator opening thec'ooling' element oflthe 'unit being on the exterior of the heat insulated walls in contact with the atmosphere of the refrigeratorcompartment. '12. The combination with a refrigerator having 'an openingfofan artificial refrigerating unit comprising fa motor, a compressor, high and low pressure lines, a casing having heat'insulated'w'alls open at one end, the high pressure coils 'exteiidi'ng' across said open end, the low pressure coils being on the exterior of the casing'fat theioppositeendflhe unit being-adapted to be'insert'ed into 'or withdrawn from the refri erator through theppening. '13. The comiination "with a refrigerator having an" opening, of an'artificial refrigerating unit including a casing, housing the operating parts: and a cireulating system for a refrigerant with the "c'o'olin g element onthe exterior of the casing at "one end, a frame at the forward end of the casingadaptedwfit in etpeiiifigepbnintroduction of the unit into'the refrigerator, said forward end of the casing being open" to atmdsp'here," the high pressure coils of the circulatin'g system'being located across the said" "opening, and means forcausing movement of air-through the coils into thfe'cas'ing and thence outwardly thereof at'theforward end.' i

14:. The combination with; a refrigerator having "a front 'opening, of an artificial refrigerating unit comprising a casing forming 'a chamber housing'the mechanism, said ch'am: her being open atthe front e'nd'to' atmosphere and adapted to be inserted into the opening to close the same with the major portion of the casing extending into the refrigerator, said portion of the casing having heat insulated walls, said unit including high pressure lines extending across the open end of the casing and low'pressure lines positioned about the exterior of' the" casing within the refrigerator, a deflector 'inelnber dividing the interior of the casing atthe forward end, a fan below the'deflector for drawing air through the high pressure lines into the 'chamber of the casing, the deflector providing for a discharge of thesaid' air throughthe front opening at the upper side;

'15; The combination with'arefrigeratorhaving an opening, of anartificial refrigerating unit comprising 'a' casing having heat insuiated'fiva'lls andjopen to atmosphere at the forward end, said casing being adapted for introduction into the refrigerator through the opening and suspended in"position to close the said opening, the said unit comprising a compressor and motor within the casing, a highpressnre line eat-ending" acrossfthe openend ofthe casing, means fordrawing air into and discharging from the interior of the casing at the forward end, low pressure lines positioned exteriorly of the insulated walls of the casing within the refrigerator, a thermostat subject to influence of the temperature of the atmosphere of the refrigerator and adapted to control operation of the motor.

' 16. An artificial refrigerating unit com prising a casing having heat, insulated walls, a motor and compressor within the casing, the forward end'ofwhich is open to'atmosphere,- a circulating system having a-high pressure 'linepositioned at the said forward end, and a low'pressure line positioned exteriorly of the casing about the sides and opposite end of the casing,and means for causing a flow of ai'i-"ihtoaiidout of' the casing through the forward end. 17 An artificial refrigerating ii'nit com: prising a casingh'a'ving heat insulated walls, the forward'3end" thereof being"open, said apparatus being'housed'wit-hin the "chamber provided by the casing? and including :high pressure coils positionediae'ro'ss the :open'e'nd ofthe casing andionrfected-with the com pressor;' *an expansion valve 1w i which" "the high pressure lines' connected, loft" pressure' c'oils, I pastimes-"shear the, 'exterior -of the heat insulatedzwalls connected with the expansion ivalv'e and'a return line connected with the com ressor, afan' for blowing air through t Inga pressure cdilsint'o the egising,'the casing havi ii'g a channel by 'e'ansof which airforced through the coils isdis charged through th'epsaid open end ofthe cas ing, the i saidj-"uni-t dieing adapted *to' be, in} troduced into' a refrigerator temperament with the lowfpressureeoils exposed" to the atmosphere of the compartmen if 18. An' artificial refrigerating unit comprising acasing having heat insulated walls about five of the' 'sides thereof, the remaining side being open, 'acompressor and -mo tor within the 'casihg;*a'circu1ating system for the "refrigerant comprising a discha'rge line fromthe compressor, a series of coils connected with said discharge line providing the high'pressure side of the circulating system, an expansion valve to which the' high pressure coils are connected,-"alow pressure line including a series of coils about'the exterior of the heat-insulated walls connected at one end with the expansionvalve and having a line extending into the chamber of the casing and connected with the intake of the compressor, a fan in the casing for drawing air into the casing through the high pressure coils, a deflector dividing the forward part of'the easing into two channels whereby airdrawn through the coils in one channel is discharged through the other channel, the said unit being adapted to be suspended in a refrigerator compartment with the open end thereof open to atmosphere externally of the compartment, a temperature controlled device subject to the infiuence of change of temperature in the compartment in which the unit is positioned adapted to control the operation of the motor.

19. In refrigerating apparatus, a refrigerator having a compartment, a casing formed of heat insulated walls extending into the refrigerator compartment from one of the walls thereof and having an opening through the said wall, an artificial refrigerating apparatus including a compressor for circulating refrigerant, the compressor being; located in the casing and removable through said opening, an expansion coil located on the exterior of the casing and exposed to the atmosphere of the refrigerator compartment, a condensing coil,-and means for operating the compressor.

20. The combination with a refrigerator having an opening to arefrigerated compartment thereof, of a reentrant .casing at the said opening, an artificial refrigerating apparatus, the heat productive elements of which} are within the casing and shielded thereby from the atmosphere of the refrigerated compartment, and the cold productive elements of which are within the refrigerated compartment, means for closing the refrigeratonopening, and means providing for a circulation of air within the casing.

'21. The combination with a refrigerator havingan opening in the wall thereof to a refrigerated compartment therewithin, of a reentrant casing insertible in the said opening and formed with heat insulating walls coextensive with the refrigerator walls and having an open end, an artificial refrigerating apparatus, the heat productive elements of which are housed within the casing, the said open end being of a size to permit introduction or removal of the said elements therethrough and the cold productive elements of which are exteriorly of the casing within the refrigerator compartment, and means for discharging the heat evolved through operation of the apparatus from the casing.

22. The combination with a refrigerator having a compartment, of a reentrant casing therewithin formed with heat insulated walls, an artificial refrigerating apparatus including a motor and a compressor and a circulating system for refrigerant including a condenser and expansion coils, the said compressor being mounted within the casing and shielded thereby from the refrigerator compartment, the said expansion coils being exteriorly of the casing within the refrigerator compartment and the said con denser being exteriorly of the refrigerating compartment and shielded therefrom by the said casing, the said casing having an opening permitting introduction or removal of the motor and compressor in assembly or disassembly of the unit, and means for circulating external atmosphere about the com- 23. The combination with a refrigerator,

of a reentrant chamber forming a component part of the refrigerator walls and formed of heat insulated walls spaced from the walls of the refrigerator interiorly thereof, an artificial refrigerating apparatus, the heat productive an radiating elements of which are shielded from the compartment by the walls of the said reentrant chamber and the cold producing element of which ison the exterior of the said chamber walls and within the said space between the walls of the chamber and of the refrigerator, and means for cooling the said heat productive and heat radiat ing elements.

24:. In artificial refrigerating apparatus, the combination with a refrigerator formed of heat insulated walls and havin an opening through-the wall thereof, ar-casing formed of heat insulated walls insertible through the said openi end substantially coinci ing with-the opening of the refrigerator, means for supporting the said casing in position, means in conjunction with the casingfor sealing the refrigerator opening, and an artificial refrigerating apparatus, the heat productive elements of which are housed within the casing and shielded thereby from the atmosphere of the refrigerator compartment and the cold productive element of which is exteriorly of the casing and within the refrigerator compartment.

25. The combination with a refrigerator having areentrant portion formed of heat insulating walls extending into the refrigerated space thereof, of an artificial refrigerating apparatus including a motor and compressor and a circulating system, the expansion side of which is within the refrigerator exteriorly of the reentrant portion of the said casing, the opening of said reentrant portion being of a size to permit introduction of the compressor thereinto and the walls of which prevent the said compressor from materially influencing the temperatur of the refrigerator compartment.

26. A refrigerator having a reentrant chamber formed of heat insulating walls coextensive with one of the walls of the refrigerator and in spaced relation with the remaining walls thereof, and an artificial refrigerating unit, comprising a motor and compressor and a circulating system including a condenser and expansion coils, the expansion coils being within the refrigerator compartment exteriorly of the said chamber walls, said walls shielding the refrigerator compartment from influence of heat evolved by the apparatus.

27. The combination with a refrigerator and having an open lee having a chamber formed with heat insulated walls coextensive with the refrigerator walls and opening to atmosphere, of an artificial refrigerating apparatus, the heat productive elements of which are housed within the chamber, the said opening of the chamber being of a size to permit introduction or removal of the said elements therethrough, and the cold productive elements of which are supported on the exterior of the chamber within the refrigerator, and means for cooling the heat productive elements of the apparatus.

28. In artificial refrigerating apparatus, a cabinet having a space to be refrigerated and provided with a re-entrant chamber extending into the said space with all of its walls in spaced relation with the cabinet walls, the wall of the cabinet having an opening leading to the interior of the re-entrant chamber, said chamber providing a housing for the operating parts of the refrigerating apparatus including a heat dissipating element, and a heat absorbing element supported on the exterior of the re-entrant chamber and adapted for connection or disconnection with the complemental parts of a refrigerating apparatus.

29. In artificial refrigerating apparatus, a cabinet having heat insulated walls, a chamber formed of heat insulated walls in fixed relation with a wall of the cabinet and extending into the interior of the cabinet, said cabinet wall having an opening leading to the interior of the chamber, a frame for coverin g the opening of the cabinet wall and having a pair of spaced openings, artificial refrigerating apparatus housed within the chamber, and a fan in the chamber through rotation of which air is drawn from the ex? terior of the cabinet through one of the openings and about the apparatus therein and discharged through the other of the openings.

In testimony whereof, we sign this specification.

CLARENCE M. HOLLEY. HOWARD L. FOSTER. 

